Gustavo (Héctor Morales), commercial engineer, and Dolores (Elisa Zulueta), journalist specialized in politics who works in a prestigious magazine, are a very formal couple, who have been married for eight years, apparently without relevant problems. Pedro (Tiago Correa), a creative and nice man but bad for business, is Gustavo's best friend. His partner is Camila (Daniela Ramírez), a model who, after the age of 30, has spent the last four months attending dozens of castings without getting a job. Faced with the economic difficulties of Pedro and Camila, at a meal at the home of Dolores and Gustavo, the latter invites them to live with them while they improve their financial problems. After a night of confidence and a lot of alcohol, they make an unexpected exchange of couples. The relationship is not the same again and even more complicated when Dolores becomes pregnant. Doubts about fatherhood provoke an absurd rivalry between friends. Forced to live together, they must resolve ...